Sliding base for grinders



F. WILLIAMS.

SLIDING BASE FOR GRINDERS.

APPLICATION FILED MAY 12. 1919.

Patented Aug. 24, 1920.

HI 11m (Milo mun;

UNITEDSTATES PATENT OFFICE.

MILTON IF. WILLIAMS, OF ST. LOUIS, MISSOURI, ASSIGNOR T0 WILLIAMS PATENT CRUSHER & PULVERIZER 00., OF LOUIS, MISSOURI, A CORPORATION OF MIS- SOURI.

SLIDING BASE FOR GRINDERS.

Specification of Letters Patent.

Application filed May 12, 1919. Serial No. 296,584.

To all whom it may concern:

Be it known that I, MILTON F. lVILLIAMs, a citizen of the United States, residing at St. Louis, State of Missouri, h ve invented certain new Sliding Bases for Grin'lers, of which the following is a specification.

This invention relates to certain new and useful improvements in sliding bases for grinders, the peculiarities of which will be hereinafter described and claimed.

The object of this invention is to provide a grinder having air connections with the stationary discharge pan below the grinder,

with a slidable base for the grinder and a telescopic connection with the air pipes.

In the accompanying drawing on which like reference letters indicate corresponding parts Figure 1 represents a plan view of a grinder and a base illustrating my invention; Fig. 2 a sectional elevation across the shaft of the grinder along the line 22 of Fig. l; and Fig. 8 a sectional elevation of the base on the line 3-3 of Fig. 1.

The letters AA designate timber sills forming the sides of a rectangular frame, the ends 13-13 connecting said sills being of lesser depth than the sills A to provide a space below the cross beams B and between the ends of the sills A. At one end of the sills the space mentioned is filled by a header C provided with a regulating air valve D for admitting air between the sills. The other end of the sills is provided with a header E having a pipe F connecting it to an exhaust fan G on the shaft of the grinder or elsewhere. The sills A are grooved out at their inner opposing faces, and in the grooves are mounted the side pieces H-H of a rectangular frame formed by said side pieces H and cross bars I. This frame forms a slidable base for the grinder J secured to said base by bolts K as shown in Fig. 1. In Figs. 2 and 3 it is shown that these bolts K extend down through the sliding base and the side sills A, in which sills are provided elongated openings or slots L to provide for the sliding movement of the base. On the under side of the sills A at the said bolts K, are recess washers iii as shown in Fig. 3 for engagement of the head of the bolts after the sliding base is adjusted and the bolts are tightened to hold the sliding base and sills firmly together in the desired position. Below the cross bars H of and useful Improvements in the sliding base are plates N and O preferably secured to said cross bars and extending outward in both directions toward the cross beams 13 over the headers C and E, and forming a slip joint practically air tight with said headers.

The grinder with its sliding base is adjustable upon the sills AA by means of rod P passing through one of the cross beams B, and a nut Q secured to the outside of said cross beam. The other end of the rod is connected to the sliding base so that by turning the nut upon the threaded end of the rod P, said base is slidably adjusted. The tightening of the belt R on the driving pulley S of the grinder is thus readily effected, and the plates N and O, by means of their telescopic connection with their respective headers maintain a practically air tight connection with a stationary pan T below the rinder and connecting the headers G and The side pieces H of the sliding base and also the top of the sills A, are grooved to receive a bearing strip U that is practically flush or even with the top of the sill and Patented Aug. 24:, 1920.

the sliding frame at each side, and extends from end to end of the sill A as shown in Fig. 1. These bearing strips hold down the sliding frame within the sills A-A against outward tendency due to the pull of the dr' ing belt. hen the bolts K are tight ened after the adjustment of the belt to the proper tightness, the sliding base and the sills are firmly fastened together by said bolts K which pass through the bottom flange of the grinder, and thus clamp the grinder firmly down upon the bearing strips U at each side. Anchor bolts V pass down through the bearing strips U at each end and through the sills, and secure the mill and its base to the floor or foundation, and thus form a rigiu construction and prevent any tendency to chatter or shake that may occur through looseness of the joints and connections.

Additional bolts may also be used if desired.

It will be seen that the tightening of the driving belt It may be readily effected by adjusting the grinder and its sliding base upon the sills, and at the same time maintain the air tight connection between said sliding frame and the air inlet and discharge pipes at each end of the pan T, so

that the delivery of the material discharged from the grinder into the pan T may be readily effected, and without interfering with the adjustment of the driving belt as above described.

A slip joint W the movement of the fan when it is moved with the machine as in this case, but is not required when the fan is independent.

The closing. plates N and O are bent over at the sides of the pan T, as indicated in Fig. 3 to improve the sliding joint connection of the plates with the top edges of the pan. The ends of the stationary pan make tight engagement with-the headers respectively.

New belts whether of canvas or leather always stretch so much that they require taking up and shortening in order to'keep them tight and operative. In other machines besides grinders a sliding base is often provided for quickly taking .up the slack in a belt, but in grinders the movement varies the relative position of the discharge opening with regard to the stationary pan or receptacle below the grinder which 's provided with air connections,- that is, pipes connecting said pan with an exhaust fan and other pipes supplying the air to the opposite end of the pan, whereby the discharge of material delivered to the pan is effected as in the case shown.

discharge opening through the sliding frame will be moved to another position above the open-topped pan as the slack is taken up, and'in any adjusted position the balance of the opening of the pan must be kept closed. It is now evident that my plates N" and 0 making close connection with the top at each end of the pan T and secured. to the. sliding base or frame, will move with the frame and close the balance of the top of the said pan'that is not required by the discharge opening in the frame, whatever the adjusted position of said frame.

. lVhile I have shown a telescoping pipe.

joint for the pipe F leading to the flywheel fan it is evident that if the fan be an independent fan and not movable with the grinder this pipe joint is not required.

The air inlet pipe E may be connected to the usual return air pipe, or may be an independent air inlet for the outside air as shown in the drawing.

in the pipe F allows for- The 1 I claim:

1. A device of the character comprising parallel stationary side sills separated to afford a space between them and securely anchored, a stationary pan open substantially as described.

2. A device of the :character described comprising a pair ofstationary separated side sills grooved on their inner faces, a

slidable frame mounted in said grooves and having a dischargeopening, a: grinder on said frame adapted to discharge through said opening-in the frame, means to slide said frame and grinder, bolts passing-vertically through said frame and through slotted holes in said'sills and-throughthe flange of the grinder for securingthesliding frame and grinder firmly in any adjusted position, a' pan located between said sills below'the discharge opening in the slid ing frame, and means to cover the balance of the top ofsaid pan outside .the discharge opening of said frame.

8. A device of the character described comprising ZL'PELH of parallel separated stationary side sills 1 grooved at their inner faces, a slidable frame mounted in said grooves and havinga discharge opening, a

grinder on said frame adapted to discharge through the said opening, a bearing strip on top of each side sill and extending laterally over the sliding frame to hold it down in said groove, anchor bolts passing through said strips and'side'sills, a stationary pan located between said sills and below the discharge opening of said sliding-frame, means to close the top of said pan except at the said discharge opening, and means to secure the side sills, the slidingiframe, and the grinder firmly together in. ny adjusted posltion.

In testimony whereofI'have affixed my signature.

MILTON F. WILLIAMS.

described, 

